package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;

@Service
public class UserServiceImpl implements UserService {

    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WeChatProperties weChatProperties;
    public static final String path = "https://api.weixin.qq.com/sns/jscode2session";
    @Override
    public User userLogin(UserLoginDTO userLoginDTO) {
        // 1. 调用微信接口服务 获取 openid
        String openid = getOpenID(userLoginDTO);
        // 2. 验证openid 正确性

        if(openid == null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        // 3. 判断用户是否为新用户
        User user = userMapper.getUserByOpenID(openid);
        if (user == null){
            // 4. 新用户自动注册
            user = User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);
        }
        // 5. 返回对象
        return user;
    }

    private String getOpenID(UserLoginDTO userLoginDTO){
        HashMap<String, String> map = new HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret", weChatProperties.getSecret());
        map.put("js_code", userLoginDTO.getCode());
        map.put("grant_type", "authorization_code");
        String json = HttpClientUtil.doGet(path,map);
        JSONObject object = JSON.parseObject(json);
        String openid = object.getString("openid");
        return openid;
    }
}
